Battery device and electric device

Abstract

Disclosed in the present application are a battery device and an electric device. The battery device comprises battery cells, a case, a sampling member and an integrated assembly, wherein a wall portion of the case is provided with an opening, and the opening is in communication with the interior of the case; the battery cells are arranged in the case; the sampling member is configured to collect information of the battery cells; and the integrated assembly comprises a substrate and a battery cell monitoring unit, the substrate being located outside the case, the substrate being detachably connected to the wall portion of the case and closing the opening, the battery cell monitoring unit being arranged on the substrate, and the sampling member being electrically connected to the battery cell monitoring unit. The technical solution provided by the present application can effectively reduce the maintenance cost of the battery device.

Description

Battery devices and electrical appliances Technical Field

[0001] This application relates to the field of battery technology, and more specifically, to a battery device and an electrical device. Background Technology

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry, and electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of this sustainable development. For electric vehicles, battery technology is a crucial factor in their development.

[0003] In the development of battery technology, how to reduce the maintenance cost of battery devices is a technical problem that urgently needs to be solved. Summary of the Invention

[0004] This application provides a battery device and an electrical device, and the technical solution provided by this application can effectively reduce the maintenance cost of the battery device.

[0005] This application is achieved through the following technical solution:

[0006] In a first aspect, some embodiments of this application provide a battery device, which includes a battery cell, a housing, a sampling device, and an integrated assembly. The housing has an opening in its wall, which communicates with the interior of the housing. The battery cell is disposed within the housing. The sampling device is used to collect information from the battery cell. The integrated assembly includes a substrate and a battery cell monitoring unit. The substrate is located outside the housing, detachably connected to the wall of the housing and closing the opening. The battery cell monitoring unit is disposed on the substrate, and the sampling device is electrically connected to the battery cell monitoring unit.

[0007] In the above solution, by integrating the battery cell monitoring unit onto the substrate, and with the substrate detachably mounted on the wall of the housing from the outside, the battery cell monitoring unit can collect information from the battery cells obtained by the sampling device to monitor information such as the voltage and temperature of the battery cells, thereby facilitating the management of the battery cells and ensuring their reliability to a certain extent. On the other hand, compared with related technologies where the battery cell monitoring unit is located inside the housing, since the entire integrated component can be disassembled from the outside of the housing, there is no need to disassemble the housing to maintain or replace the battery cell monitoring unit, which can effectively improve maintenance efficiency and reduce maintenance costs.

[0008] According to some embodiments of this application, the battery cell monitoring unit is disposed on the side of the substrate facing the interior of the housing.

[0009] In the above solution, by placing the battery cell monitoring unit inside the substrate, the length of the circuit structure between the sampling component and the battery cell monitoring unit can be saved, thereby reducing the manufacturing cost of the battery device. On the other hand, it can reduce the risk of the battery cell monitoring unit being damaged by external impacts, thus making the battery device highly reliable.

[0010] According to some embodiments of this application, the battery device further includes fasteners configured to detachably connect the substrate to the wall of the housing from the outside of the housing.

[0011] In the above solution, the fasteners can detachably connect the base plate to the wall of the housing from the outside of the housing, so that the entire integrated component can be easily assembled into and disassembled from the housing, thereby reducing the manufacturing difficulty and maintenance difficulty of the battery device, effectively improving the manufacturing efficiency and maintenance effect of the battery device, and effectively reducing the maintenance cost of the battery cell monitoring unit, thereby effectively reducing the maintenance cost of the battery device.

[0012] According to some embodiments of this application, the substrate is an insulating board.

[0013] In the above scheme, by setting the substrate as an insulating plate, the battery cell monitoring unit can be installed on the substrate insulatedly, reducing the risk of short circuits between various components in the battery device and making the battery device more reliable.

[0014] According to some embodiments of this application, the sampling element is a flexible circuit board.

[0015] In the above scheme, by setting the sampling component as a flexible circuit board, the sampling component can be arranged arbitrarily according to the internal space layout requirements of the battery device, which is conducive to improving the utilization rate of the internal space of the battery device. Moreover, the flexible circuit board is lightweight and thin, which can effectively improve the volume and mass energy density of the battery device.

[0016] According to some embodiments of this application, the sampling component includes a sampling segment and a connecting segment. The sampling segment is connected to a single battery cell. One end of the connecting segment is connected to the sampling segment, and the other end is connected to the single battery cell monitoring unit; the connecting segment has a bent structure.

[0017] In the above scheme, the sampling component includes a sampling section and a connecting section. The sampling section is connected to the battery cell, which can effectively collect the voltage, temperature or other information of the battery cell. The connecting section with a bending design is connected to the battery cell monitoring unit to play a role in redundancy design. This makes it easy to pull out the integrated component as a whole after disassembling the box, reducing the risk of the circuit structure between the battery cell monitoring unit and the battery cell being broken during maintenance, thereby improving the maintenance efficiency of the battery cell monitoring unit.

[0018] According to some embodiments of this application, the connecting segment includes a plurality of folded portions and at least one connecting portion, wherein the plurality of folded portions are stacked and adjacent two folded portions are connected by a connecting portion.

[0019] In the above scheme, the connecting section includes multiple stacked folded parts and two adjacent folded parts are connected by a connecting part. This allows for a large redundancy in the electrical connection structure between the sampling section and the battery cell monitoring unit. This effectively reduces the risk of the circuit structure between the battery cell monitoring unit and the battery cell being broken due to the integrated components being pulled out as a whole during maintenance. This improves the maintenance efficiency of the battery cell monitoring unit and reduces the maintenance cost of the battery device.

[0020] According to some embodiments of this application, a magnetic attraction element is provided on the folded portion, which is used to bring multiple folded portions together.

[0021] In the above solution, by setting magnetic components on the folding parts, the magnetic attraction force makes multiple folding parts move closer to each other, reducing the waste of internal space of the battery device caused by the redundant design of the connecting sections, making the internal structure of the battery device compact and the space utilization rate high.

[0022] According to some embodiments of this application, the battery device includes at least one battery cell assembly, the battery cell assembly includes a plurality of battery cells stacked along a first direction, and an integrated assembly is located on one side of the battery cell assembly along the first direction.

[0023] In the above scheme, the integrated component is set on one side of the stacking direction of multiple battery cells in the battery cell assembly, which facilitates the layout of the circuit structure between the sampling device and the battery cell monitoring unit, making the internal space of the battery device compact and effectively improving the volumetric energy density of the battery device.

[0024] According to some embodiments of this application, the battery device includes at least two battery cell assemblies arranged along a second direction, and the integrated assembly includes at least two battery cell monitoring units, which are arranged in a one-to-one correspondence with the battery cell assemblies, with the first direction and the second direction being perpendicular to each other.

[0025] In the above scheme, the battery cells in the battery cell assembly are stacked along the first direction, and the battery cell assembly is arranged along the second direction, which makes the spatial layout of the battery cells in the battery device compact, which is conducive to improving the volumetric energy density of the battery device. At the same time, by setting the battery cell monitoring unit corresponding to the battery cell assembly, the voltage, temperature or other information of the battery cells can be effectively monitored, which is conducive to the health management of the battery device and the improvement of the reliability of the battery device.

[0026] According to some embodiments of this application, the integrated component further includes a low-voltage connector disposed on the side of the substrate away from the interior of the housing, and the low-voltage connector is electrically connected to the battery cell monitoring unit.

[0027] In the above solution, the substrate is also equipped with a low-voltage connector. On the one hand, this allows the battery cell monitoring unit and the low-voltage connector to be integrated into the same structure, which is beneficial for the wiring layout of the electrical connection structure between the battery cell monitoring unit and the low-voltage connector. This can save on the material cost of the electrical connection structure between the two, thereby reducing the material cost of the battery device. On the other hand, since the substrate can be disassembled from the outside of the housing, when maintaining the low-voltage connector in the later stage, only the substrate needs to be disassembled to maintain the battery cell monitoring unit and the low-voltage connector. Therefore, the maintenance difficulty is low, the efficiency is high, and the maintenance cost is low.

[0028] According to some embodiments of this application, the integrated component further includes a high-voltage connector disposed on the side of the substrate away from the interior of the housing, and the high-voltage connector is electrically connected to the battery cell for input and output of electrical energy.

[0029] In the above solution, the substrate is also equipped with a high-voltage connector, which integrates the high-voltage connector, the low-voltage connector and the battery cell monitoring unit into one unit. This can effectively reduce the assembly difficulty of the battery device for external information output and power output and input structures, improve the manufacturing efficiency of the battery device, and since the integrated components can be disassembled from the housing, the battery device has low maintenance difficulty and low maintenance cost.

[0030] According to some embodiments of this application, the battery device further includes an electrical connector, through which the battery cell is connected to the high-voltage connector, and at least a portion of the electrical connector is made of a flexible material.

[0031] In the above solution, at least part of the electrical connector is made of flexible material, so that there is a redundant design between the battery cell and the high-voltage connector. This can effectively reduce the risk of the circuit structure between the high-voltage connector and the battery cell being broken due to the integrated components being pulled out as a whole during maintenance. This will help improve the maintenance efficiency of the battery cell monitoring unit and reduce the maintenance cost of the battery device.

[0032] According to some embodiments of this application, at least a portion of the electrical connector is a bent structure.

[0033] In the above solution, by setting at least a portion of the electrical connector as a bent structure, the redundancy of the electrical connector can be increased, which can effectively reduce the risk of the circuit structure between the high-voltage connector and the battery cell being broken due to the integrated component being pulled out as a whole during maintenance. This is conducive to improving the maintenance efficiency of the battery cell monitoring unit and reducing the maintenance cost of the battery device.

[0034] According to some embodiments of this application, the integrated component also includes a manual maintenance switch, which is disposed on the side of the substrate away from the interior of the housing and connected in series with the high-voltage connector.

[0035] In the above solution, the substrate is also equipped with a manual maintenance switch, which integrates the manual maintenance switch, high voltage connector, low voltage connector and battery cell monitoring unit into one unit. This can effectively reduce the assembly difficulty of the battery device for external information output and power output and input structure, improve the manufacturing efficiency of the battery device, and since the integrated components can be disassembled from the housing, the battery device has low maintenance difficulty and low maintenance cost.

[0036] According to some embodiments of this application, two battery cell monitoring units are provided on the substrate, the two battery cell monitoring units are arranged at intervals, and a high-voltage connector and a low-voltage connector are located between the two battery cell monitoring units.

[0037] In the above solution, the two battery cell monitoring units are placed on both sides of the high-voltage connector and the low-voltage connector, which facilitates the connection between the connectors at the battery end and the connectors of the electrical device, reducing the assembly difficulty between the battery end and the electrical device.

[0038] Secondly, some embodiments of this application also provide an electrical device, including the battery device provided in the first aspect.

[0039] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0040] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 is a schematic diagram of the vehicle in some embodiments of this application;

[0042] Figure 2 is a perspective view of the battery device in some embodiments of this application;

[0043] Figure 3 is a schematic diagram of the battery device in some embodiments of this application;

[0044] Figure 4 is a front view of the integrated components in some embodiments of this application;

[0045] Figure 5 is a rear view of the integrated components in some embodiments of this application;

[0046] Figure 6 is a top view of some embodiments of this application;

[0047] Figure 7 is a schematic diagram of a partial structure of the integrated component in some embodiments of this application;

[0048] Figure 8 is a schematic diagram of the substrate, battery cell monitoring unit and battery cell in some embodiments of this application;

[0049] Figure 9 is a schematic diagram of the sampling element and battery cell assembly in some embodiments of this application;

[0050] Figure 10 is an enlarged view of point A in Figure 9;

[0051] Figure 11 is a partial structural diagram of the integrated components and battery cells in some embodiments of this application;

[0052] Figure 12 is a schematic diagram of the sampling element and the integrated component in some embodiments of this application;

[0053] Figure 13 is a schematic diagram of the structure of the connecting segment in some embodiments of this application;

[0054] Figure 14 is a schematic diagram of battery cells, electrical connectors and integrated components in some embodiments of this application;

[0055] Figure 15 is a schematic diagram of electrical connectors in some embodiments of this application.

[0056] Icons: 1000 - Vehicle; 100 - Battery Unit; 200 - Controller; 300 - Motor; 10 - Housing; 11 - First Housing Body; 110 - Bottom Wall; 111 - Front Panel; 1110 - Opening; 12 - Second Housing Body; 120 - Top Wall; 121 - Side Wall; 20 - Battery Cell Assembly; 21 - Battery Cell; 30 - Sampling Component; 31 - Sampling Section; 32 - Connecting Section; 320 - Folding Part; 321 - Connecting Part; 322 - Magnetic suction element; 323-First bend; 324-Second bend; 325-Third bend; 34-Temperature sensor; 40-Integrated component; 41-Substrate; 42-Battery cell monitoring unit; 43-Fastener; 44-Low-voltage connector; 45-High-voltage connector; 450-Electrical connector; 46-Manual maintenance switch; 50-Insulator; 60-Housing; 70-Seal; x-First direction; y-Second direction; z-Third direction. Detailed Implementation

[0057] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0058] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0059] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0060] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0061] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0062] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0063] In this application, "multiple" means two or more (including two).

[0064] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0065] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0066] A single battery cell typically includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charging and discharging process of a single battery cell, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, helps prevent short circuits to some extent while allowing active ions to pass through.

[0067] In some embodiments, the positive electrode may be a positive electrode sheet, which may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0068] As an example, the positive current collector has two surfaces opposite each other in its own thickness direction, and the positive active material is disposed on either or both of the two opposite surfaces of the positive current collector.

[0069] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0070] As an example, the negative electrode current collector can be a metal foil, a foamed metal, or a composite current collector. For example, as a metal foil, it can be silver-treated aluminum or stainless steel, stainless steel, copper, aluminum, nickel, carbon electrode, nickel, or titanium, etc. Foamed metal can be foamed nickel, foamed copper, foamed aluminum, foamed alloy, etc. Composite current collectors can include a polymer material base layer and a metal layer. Composite current collectors can be formed by forming a metal material (copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0071] As an example, the negative electrode sheet may include a negative electrode current collector and a negative electrode active material disposed on at least one surface of the negative electrode current collector.

[0072] As an example, the negative electrode current collector has two surfaces opposite each other in its own thickness direction, and the negative electrode active material is disposed on either or both of the two opposite surfaces of the negative electrode current collector.

[0073] In some embodiments, the positive current collector can be made of aluminum, and the negative current collector can be made of copper.

[0074] In some embodiments, the electrode assembly further includes an isolator disposed between the positive and negative electrodes.

[0075] In some embodiments, the separator is a separator membrane. The separator membrane can be of various types, and any known porous separator membrane with good chemical and mechanical stability can be selected.

[0076] As an example, the material of the separator may include at least one of glass fiber, nonwoven fabric, polyethylene, polypropylene, and polyvinylidene fluoride. The separator may be a single-layer film or a multi-layer composite film. When the separator is a multi-layer composite film, the materials of each layer may be the same or different. The separator may be a separate component located between the positive and negative electrodes, or it may be attached to the surfaces of the positive and negative electrodes.

[0077] In some embodiments, the separator is a solid electrolyte. The solid electrolyte is disposed between the positive and negative electrodes, serving both to transport ions and to isolate the positive and negative electrodes.

[0078] In some embodiments, the battery cell also includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. The electrolyte can be liquid, gel-like, or solid. Liquid electrolytes include electrolyte salts and solvents.

[0079] In some implementations, the electrode assembly has a wound structure. The positive and negative electrode sheets are wound into a wound structure.

[0080] In some implementations, the electrode assembly has a stacked structure.

[0081] As an example, multiple positive and negative electrodes can be set, and multiple positive and multiple negative electrodes can be stacked alternately.

[0082] As an example, multiple positive electrode plates can be provided, and negative electrode plates can be folded to form multiple stacked folded segments, with a positive electrode plate sandwiched between adjacent folded segments.

[0083] As an example, both the positive and negative electrode plates are folded to form multiple stacked folded segments.

[0084] As an example, multiple separators can be provided, each positioned between any adjacent positive or negative electrode plates.

[0085] As an example, the separators can be continuously arranged, either by folding or rolling between any adjacent positive or negative electrode plates.

[0086] In some embodiments, the electrode assembly can be cylindrical, flat, or polygonal, etc.

[0087] In some embodiments, the electrode assembly is provided with tabs that allow current to be drawn from the electrode assembly. The tabs include a positive tab and a negative tab.

[0088] In some embodiments, the battery cell may include a housing. The housing is used to encapsulate components such as electrode assemblies and electrolytes. The housing may be made of steel, aluminum, plastic (such as polypropylene), composite metal (such as copper-aluminum composite), or aluminum-plastic film, etc.

[0089] As an example, a battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include, but are not limited to, square battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries.

[0090] The battery apparatus mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells connected in series, parallel, or mixed connections via a busbar.

[0091] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells; as an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form a single module. As an example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0092] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cells housed within the housing.

[0093] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0094] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0095] As an example, the enclosure may include a first enclosure body and a second enclosure body. The first enclosure body and the second enclosure body are fastened together to form a closed space inside the enclosure to house the individual battery cells. Here, "closed" refers to covering or closing, which can be either sealed or unsealed. The first enclosure body may be a top cover or a bottom plate.

[0096] As an example, the enclosure may include a top cover, a frame, and a bottom plate. The top cover and bottom plate are connected to the frame, creating an enclosed space inside the enclosure to house the individual battery cells.

[0097] As an example, the housing can be part of the vehicle's chassis structure. For instance, the housing's roof can be at least part of the vehicle's floor, or the housing's frame can be at least part of the vehicle's crossbeams and longitudinal beams.

[0098] In some embodiments, the battery device refers to an energy storage device, which includes a housing with a door on at least one side. The energy storage device includes energy storage containers, energy storage cabinets, etc. In some embodiments, one or more energy storage devices may constitute at least part of an energy storage system.

[0099] Battery devices possess outstanding advantages such as high energy density, low environmental pollution, high power density, long service life, wide applicability, and low self-discharge coefficient, making them an important component of today's new energy development. The development of battery technology must simultaneously consider multiple design factors, such as performance parameters like energy density, cycle life, and discharge capacity. Furthermore, the maintenance costs of battery devices must also be taken into account.

[0100] In related technologies, in order to improve the reliability of battery devices, it is necessary to monitor the voltage and temperature of individual battery cells during the use of the battery devices to collect operating data such as voltage and temperature of individual battery cells. In order to ensure the accuracy of the collected data, a cell monitoring unit (CMC) is selected to monitor the voltage and temperature of individual battery cells in the battery device.

[0101] Generally, the battery cell monitoring unit is located inside the battery pack and is electrically connected to the battery cells or sensors within the battery pack to collect relevant data. As the battery pack is used for longer periods, the probability of the battery cell monitoring unit malfunctioning increases, thus requiring maintenance. However, since the battery cell monitoring unit is usually located inside the battery pack housing, maintenance requires disassembling the housing, resulting in high maintenance difficulty and cost.

[0102] In view of this, to improve the problem of high maintenance costs caused by the need to disassemble the housing during maintenance due to the battery cell monitoring unit being located inside the housing, some embodiments of this application provide a battery device, which includes a battery cell, a housing, a sampling component, and an integrated assembly. An opening is provided in the wall of the housing, communicating with the interior of the housing. The battery cell is disposed inside the housing. The sampling component is used to collect information from the battery cell. The integrated assembly includes a substrate and a battery cell monitoring unit. The substrate is located outside the housing, detachably connected to the wall of the housing and closing the opening. The battery cell monitoring unit is disposed on the substrate, and the sampling component is electrically connected to the battery cell monitoring unit.

[0103] In the above solution, by integrating the battery cell monitoring unit onto the substrate, and with the substrate detachably mounted on the wall of the housing from the outside, the battery cell monitoring unit can collect information from the battery cells obtained by the sampling device to monitor information such as the voltage and temperature of the battery cells, thereby facilitating the management of the battery cells and ensuring their reliability to a certain extent. On the other hand, compared with related technologies where the battery cell monitoring unit is located inside the housing, since the entire integrated component can be disassembled from the outside of the housing, there is no need to disassemble the housing to maintain or replace the battery cell monitoring unit, which can effectively improve maintenance efficiency and reduce maintenance costs.

[0104] The battery device disclosed in this application can be used, but is not limited to, vehicles, and can also be used in other electrical devices with battery swapping capabilities, including but not limited to ships, aircraft, and other devices with battery swapping capabilities.

[0105] For ease of explanation, the following embodiments will be described using a vehicle as an example of an electrical device according to an embodiment of this application.

[0106] Please refer to Figure 1, which is a schematic diagram of a vehicle 1000 in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. The type of vehicle 1000 can be a sedan, SUV, heavy truck, or bus, etc. A battery device 100 is installed inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000's electrical system, such as meeting the power requirements for starting, navigation, and operation of the vehicle 1000.

[0107] The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, for the power needs of the vehicle 1000 during startup, navigation and driving.

[0108] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0109] This application provides a battery device 100 in some embodiments. Please refer to Figures 2-8. Figure 2 is a perspective view of the battery device 100 in some embodiments of this application. Figure 3 is a schematic diagram of the battery device 100 in some embodiments of this application. Figure 4 is a front view of the integrated component 40 in some embodiments of this application. Figure 5 is a rear view of the integrated component 40 in some embodiments of this application. Figure 6 is a top view in some embodiments of this application. Figure 7 is a schematic diagram of a partial structure of the integrated component 40 in some embodiments of this application. Figure 8 is a schematic diagram of the substrate 41, the battery cell monitoring unit 42, and the battery cell 21 in some embodiments of this application.

[0110] The battery device 100 includes a battery cell 21, a housing 10, a sampling element 30, and an integrated assembly 40. The housing 10 has an opening 1110 in its wall, which connects to the interior of the housing 10. The battery cell 21 is disposed inside the housing 10. The sampling element 30 is used to collect information from the battery cell 21. The integrated assembly 40 includes a substrate 41 and a battery cell monitoring unit 42. The substrate 41 is located outside the housing 10 and is detachably connected to the wall of the housing 10, closing the opening 1110. The battery cell monitoring unit 42 is disposed on the substrate 41, and the sampling element 30 is electrically connected to the battery cell monitoring unit 42.

[0111] The housing 10 provides a closed space for the battery cells 21, enabling the integration of multiple battery cells 21 into a single unit, thus reducing the impact of external materials on the battery cells 21. In some embodiments, the housing 10 includes a first housing body 11 and a second housing body 12, which are interconnected to jointly define a space for accommodating the battery cells 21. Optionally, the first housing body 11 and the second housing body 12 can both be hollow structures open on one side, with the open sides of the first housing body 11 and the second housing body 12 cooperating to jointly define the space; alternatively, the first housing body 11 can be a hollow structure open at one end, and the second housing body 12 can be a plate-like structure disposed on the open side of the first housing body 11, so that the first housing body 11 and the second housing body 12 jointly define the accommodating space. Optionally, the battery cells 21 disposed within the accommodating space can be one or multiple.

[0112] Optionally, the first box body 11 is a lower box body 10, which has a bottom wall 110 and front panels 111 disposed at both ends of the bottom wall 110. The two front panels 111 are disposed opposite each other along a first direction x. The second box body 12 is an upper box cover, which has a top wall 120 and side walls 121 disposed on both sides of the top wall 120. The two side walls 121 are disposed opposite each other along a second direction y. The bottom wall 110 and the top wall 120 are disposed opposite each other along a third direction z. The first direction x, the second direction y, and the third direction z are perpendicular to each other. The ends of the two front panels 111 that are away from the bottom wall 110 are respectively connected to the top wall 120, and the ends of the two side walls 121 that are away from the top wall 120 are respectively connected to the bottom wall 110.

[0113] For example, the battery device 100 is provided with multiple battery cells 21, which can be connected in series, parallel, or in a mixed manner. A mixed connection means that some of the battery cells 21 are connected in series and others in parallel. The multiple battery cells 21 can be directly connected in series, parallel, or in a mixed manner, and then the whole formed by the multiple battery cells 21 is housed in a closed space. Of course, the battery device 100 can also be formed by first connecting multiple battery cells 21 in series, parallel, or in a mixed manner to form a group of battery cells 21, and then connecting multiple groups of battery cells 21 in series, parallel, or in a mixed manner to form a whole, which is housed in a space formed by the first housing body 11 and the second housing body 12.

[0114] Optionally, the battery device 100 is provided with a plurality of battery cell assemblies 20, each battery cell assembly 20 including a plurality of battery cells 21 stacked together. For example, as shown in FIG8, two battery cell assemblies 20 are arranged along the second direction y, and each battery cell assembly 20 includes a plurality of battery cells 21 stacked along the first direction x.

[0115] The sampling element 30 is a structural component installed inside the housing 10, used to collect information such as the temperature and voltage of the battery cells 21. Generally, the temperature or voltage information collected by the sampling element 30 is transmitted to the battery management system through other structures of the battery device 100. When the battery management system detects that the temperature or voltage information of the battery cells exceeds the normal range, it will limit the output power of the battery device 100 to achieve safety protection.

[0116] Optionally, in some embodiments, the sampling element 30 can be electrically connected to the battery cell 21 to collect the voltage information of the battery cell 21. The sampling element 30 may include a temperature sensor 34, which may be disposed on the battery cell 21 to collect the temperature information of the battery cell 21.

[0117] For example, please refer to Figures 9 and 10. Figure 9 is a schematic diagram of the sampling element 30 and the battery cell assembly 20 in some embodiments of this application, and Figure 10 is an enlarged view of point A in Figure 9. The sampling element 30 includes a flexible circuit board, which is configured with a temperature sensor (such as a negative temperature coefficient thermistor, NTC). The flexible circuit board is disposed at one end of the battery cell assembly 20 and collects the temperature information of the battery cell 21 through the temperature sensor. Optionally, multiple temperature sensors are disposed on a flexible circuit board, with one temperature sensor corresponding to one battery cell 21, so that the flexible circuit board can collect the temperature information of multiple battery cells 21. In some embodiments, the flexible circuit board is connected to the output terminal of the battery cell 21 through an electrical connection structure, and can collect the voltage information of the battery cell 21. For example, the flexible circuit board is connected to the output terminal of the battery cell 21 through a nickel strip.

[0118] The integrated component 40 includes a substrate 41 and a cell monitoring unit 42. The cell monitoring unit 42, also known as the CMC (Cell Monitoring Circuit), is electrically connected to the sampling element 30 to monitor information about the cell 21 collected by the sampling element 30. In some embodiments, the cell monitoring unit 42 can be connected to the central processing unit of a battery management system (BMS).

[0119] In some embodiments, the sampling element 30 and the battery cell monitoring unit 42 can be directly connected. For example, the sampling element 30 includes a flexible circuit board, the end of which is directly connected to the battery cell monitoring unit 42. Exemplarily, the battery cell monitoring unit 42 has a socket, and the end of the flexible circuit board is provided with a plug that can be inserted into the socket to achieve an electrical connection between the battery cell monitoring unit 42 and the sampling element 30.

[0120] For example, the sampling component 30 and the battery cell monitoring unit 42 are connected by an electrical connection structure, which includes structural components such as wires that can realize the transmission of electrical signals.

[0121] The substrate 41 is a structural component that supports the battery cell monitoring unit 42. The connection between the battery cell monitoring unit 42 and the substrate 41 is varied, including but not limited to riveting, bonding, or connection through other structural components. For example, the battery cell monitoring unit 42 is fixed to the substrate 41 by bolts.

[0122] In some embodiments of this application, the wall of the housing 10 has an opening 1110 that communicates with the interior of the housing 10. The substrate 41 is detachably connected to the wall of the housing 10 and closes the opening 1110. The substrate 41 and the wall of the housing 10 can be detachably connected in various ways. For example, the substrate 41 and the wall of the housing 10 can be detachably connected by a fastener 43, which can be a threaded structure. The substrate 41 can be installed or removed by tightening the fastener 43. Alternatively, the substrate 41 can be provided with a snap-fit ​​structure that can pass through the opening 1110 and snap onto the wall.

[0123] "Closed opening 1110" can be understood as follows: when the substrate 41 is assembled to the wall of the housing 10, the opening 1110 can be closed, so that the battery cell 21 inside the housing 10 is in a closed space. When the substrate 41 is removed from the wall of the housing 10, the internal structure of the battery device 100 can be exposed to the outside through the opening 1110.

[0124] In some embodiments, the opening 1110 may be formed on the first box body 11 or the second box body 12. Exemplarily, the opening 1110 is formed on one of the front panels 111 of the first box body 11.

[0125] In some embodiments, the integrated component 40 is configured with a housing 60, as shown in FIG. 6. The housing 60 covers the battery cell monitoring unit so that the main part of the battery cell monitoring unit is protected by the housing 60, reducing interference from external substances. Optionally, the battery cell monitoring unit is disposed inside the substrate 41, and the housing 60 is connected to the inner side of the substrate 41 and protrudes from the inner side of the substrate 41. When the integrated component 40 is assembled to the front panel 111, the housing 60 can pass through the opening 1110 and be located inside the housing 10.

[0126] Optionally, a seal 70 is provided on the inner side of the integrated component 40, which can contact the wall of the housing 10 to achieve a sealing fit between the integrated component 40 and the wall of the housing 10.

[0127] In the above solution, by integrating the battery cell monitoring unit 42 onto the substrate 41, and with the substrate 41 being detachably mounted on the wall of the housing 10 from the outside, the battery cell monitoring unit 42 can collect information from the battery cell 21 collected by the sampling element 30 to monitor information such as the voltage and temperature of the battery cell 21, thereby facilitating the management of the battery cell 21 and ensuring its reliability to a certain extent. On the other hand, compared with the related technology where the battery cell monitoring unit 42 is located inside the housing 10, since the entire integrated component 40 can be disassembled from the outside of the housing 10, it is not necessary to disassemble the housing 10 to maintain or replace the battery cell monitoring unit 42, which can effectively improve maintenance efficiency and reduce maintenance costs.

[0128] According to some embodiments of this application, the battery cell monitoring unit 42 is disposed on the side of the substrate 41 facing the interior of the housing 10.

[0129] In some embodiments, the battery cell monitoring unit 42 may be disposed on the side of the substrate 41 facing the inside of the housing 10. That is, when the substrate 41 is assembled to the wall of the housing 10, the inner side of the substrate 41 may be in contact with the wall of the housing 10, and the battery cell monitoring unit 42 may be located inside the housing 10.

[0130] For example, please refer to FIG7. The battery cell monitoring unit 42 is disposed on the inner side of the substrate 41. It is a structural component for electrical connection with the sampling component 30, such as a socket, which is arranged in the direction of facing the inside of the housing 10.

[0131] In the above solution, by placing the battery cell monitoring unit 42 inside the substrate 41, the length of the circuit structure between the sampling component 30 and the battery cell monitoring unit 42 can be saved, thereby saving the manufacturing cost of the battery device 100. On the other hand, the risk of the battery cell monitoring unit 42 being damaged by external impact can be reduced, making the battery device 100 highly reliable.

[0132] In some other embodiments, the battery cell monitoring unit 42 may be disposed on the side of the substrate 41 away from the inside of the housing 10, and the circuit structure between the battery cell monitoring unit 42 and the sampling element 30 may be disposed on the substrate 41.

[0133] According to some embodiments of this application, the battery device 100 further includes a fastener 43 configured to detachably connect the substrate 41 to the wall of the housing 10 from the outside of the housing 10.

[0134] In some embodiments, the substrate 41 is detachably connected to the wall of the housing 10 by fasteners 43. Furthermore, the connection between the substrate 41 and the wall of the housing 10 can be released by external operation of the housing 10.

[0135] For example, the fastener 43 can be a bolt, the substrate 41 can be provided with a countersunk hole, the wall of the housing 10 can be provided with a threaded hole, the head of the fastener 43 abuts against the step of the countersunk hole, and the tail thread of the fastener 43 is provided in the threaded hole. By tightening the fastener 43 from the outside of the housing 10, the fastener 43 and the threaded hole are fastened or separated from each other, so as to realize the connection or disassembly of the substrate 41 and the housing 10.

[0136] In the above scheme, the fastener 43 can detachably connect the base plate 41 to the wall of the housing 10 from the outside of the housing 10, so that the entire integrated assembly 40 can be easily assembled into and disassembled from the housing 10, thereby reducing the manufacturing difficulty and maintenance difficulty of the battery device 100, effectively improving the manufacturing efficiency and maintenance effect of the battery device 100, and effectively reducing the maintenance cost of the battery cell monitoring unit 42, thereby effectively reducing the maintenance cost of the battery device 100.

[0137] In some other embodiments, the substrate 41 may also be detachably connected to the wall of the housing 10 in other ways. For example, the inner side of the substrate 41 is provided with a snap-fit ​​arm that can pass through the opening 1110 and be connected to the inner wall of the housing 10.

[0138] According to some embodiments of this application, substrate 41 is an insulating plate.

[0139] Optionally, the substrate 41 can be made of an insulating material. For example, the substrate 41 is made of insulating materials including but not limited to epoxy resin composites, polyimide, ceramics, etc.

[0140] Optionally, the substrate 41 is plate-shaped, with a thin thickness and a large surface area, serving to support the battery cell monitoring unit 42.

[0141] In the above scheme, by setting the substrate 41 as an insulating plate, the battery cell monitoring unit 42 can be installed on the substrate 41 insulatedly, reducing the risk of short circuits between various components in the battery device 100 and making the battery device 100 have high reliability.

[0142] According to some embodiments of this application, the sampling element 30 is a flexible circuit board.

[0143] A flexible printed circuit board (FPCB or FPC) is a type of circuit board that can be bent and folded. Unlike traditional rigid PCBs, it has high flexibility and bendability. This type of circuit board typically consists of an insulating substrate, a conductive layer, and a cover layer, and can be designed as a single-layer, double-layer, or multi-layer structure.

[0144] In some embodiments, the sampling element 30 is a flexible circuit board. For example, the flexible circuit board can extend along the stacking direction of the battery cell 21, that is, the flexible circuit board has a large dimension in its extension direction so as to be able to collect information such as temperature and voltage of each battery cell 21.

[0145] In the above scheme, by setting the sampling component 30 as a flexible circuit board, the sampling component 30 can be arranged arbitrarily according to the internal space layout requirements of the battery device 100, which is conducive to improving the utilization rate of the internal space of the battery device 100. Moreover, the flexible circuit board is lightweight and thin, which can effectively improve the volume and mass energy density of the battery device 100.

[0146] According to some embodiments of this application, please refer to Figures 8, 9, 11, 12 and 13. Figure 11 is a partial structural schematic diagram of the integrated component 40 and the battery cell 21 in some embodiments of this application. Figure 12 is a schematic diagram of the sampling component 30 and the integrated component 40 in some embodiments of this application. Figure 13 is a structural schematic diagram of the connecting segment 32 in some embodiments of this application.

[0147] The sampling component 30 includes a sampling section 31 and a connecting section 32. The sampling section 31 is connected to the battery cell 21. One end of the connecting section 32 is connected to the sampling section 31, and the other end is connected to the battery cell monitoring unit 42. The connecting section 32 has a bent structure.

[0148] In some embodiments, the sampling element 30 includes a sampling segment 31 and a connecting segment 32. The sampling segment 31 is connected to the battery cell 21 and can collect information such as temperature and voltage of the battery cell 21. The connecting segment 32 connects the sampling segment 31 and the battery cell monitoring unit 42 so as to transmit the collected information to the battery cell monitoring unit 42 through the connecting segment 32.

[0149] Optionally, the sampling component 30 is a flexible circuit board, the sampling section 31 is the part where the flexible circuit board is connected to the battery cell 21, and the connecting section 32 is the extension of the flexible circuit board outside the battery cell 21, which can be connected to the battery cell monitoring unit 42.

[0150] Optionally, the sampling component 30 is a flexible circuit board, and the connecting segment 32 is an electrical connection structure disposed between the flexible circuit board and the battery cell monitoring unit 42. For example, the connecting segment 32 is a bent aluminum connection structure, copper connection structure or other conductive connection structure disposed between the flexible circuit boards.

[0151] The connection between the connecting section 32 and the battery cell monitoring unit 42 can be varied. For example, the connecting section 32 can be soldered to the input end of the battery cell monitoring unit 42, or the connecting section 32 and the input end of the battery cell monitoring unit 42 can be connected by a socket and a plug.

[0152] "The connecting segment 32 is a bent structure" can be understood as the connecting segment 32 being bent at at least one position, so that when the connecting segment 32 is not subjected to external force, the bent part of the connecting segment 32 is stacked to have a shorter size, and when the connecting segment 32 is subjected to external force, the bent part of the connecting segment 32 is stretched to have a longer size.

[0153] Optionally, the connecting segment 32 may be bent at one, two, or more locations.

[0154] In the above scheme, the sampling component 30 includes a sampling section 31 and a connecting section 32. The sampling section 31 is connected to the battery cell 21, which can effectively collect the voltage, temperature or other information of the battery cell 21. The connecting section 32 with a bending design is connected to the battery cell monitoring unit 42 to play a role in redundancy design. This makes it easy for the integrated component 40 to be pulled out as a whole after being disassembled from the housing 10, reducing the risk of the circuit structure between the battery cell monitoring unit 42 and the battery cell 21 being broken during maintenance, thereby improving the maintenance efficiency of the battery cell monitoring unit 42.

[0155] According to some embodiments of this application, please refer to Figures 12 and 13. The connecting segment 32 includes a plurality of folded portions 320 and at least one connecting portion 321. The plurality of folded portions 320 are stacked, and two adjacent folded portions 320 are connected by a connecting portion 321.

[0156] Optionally, the connecting segment 32 is bent at multiple locations to form multiple stacked folded portions 320, and adjacent stacked portions are bent through the connecting portion 321 for transition.

[0157] For example, referring to Figures 12 and 13, the connecting segment 32 is bent at multiple locations in the first direction x to form a plurality of folded portions 320 stacked along the first direction x. The folded portions 320 are flat segments, and adjacent stacked portions are transitioned by bending through a connecting portion 321, which is arc-shaped. In some embodiments of this application, as shown in Figure 13, the number of folded portions 320 is three, and the number of connecting portions 321 is two.

[0158] Optionally, the connecting portion 321 is a bent arc segment, and the bending direction of the connecting portion 321 is parallel to the third direction z. Optionally, the bending direction of the connecting portion 321 is parallel to the second direction y.

[0159] Optionally, the connecting segment 32 may also include other parts. For example, please refer to Figure 13. The connecting segment 32 includes three folded portions 320 and two connecting portions 321. The folded portion 320 closest to the battery cell 21 is connected to the sampling segment 31. The folded portion 320 closest to the battery cell monitoring unit is connected to the battery cell monitoring unit 42 through multiple bending structures. These multiple bending structures can be understood as structural components formed by multiple bends. For example, these multiple bending structures include a first bending portion 323, a second bending portion 324, and a third bending portion 325. The folded portion 320 closest to the battery cell monitoring unit bends and transitions to the first bending portion 323. The first bending portion 323 is perpendicular to the folded portion 320. The first bending portion 323 bends and transitions to the second bending portion 324. The second bending portion 324 is perpendicular to the first bending portion 323. The second bending portion 324 bends and transitions to the third bending portion 325. The third bending portion 325 is perpendicular to the second bending portion 324.

[0160] In the above scheme, the connecting section 32 includes multiple stacked folded parts 320 and two adjacent folded parts 320 are connected by a connecting part 321. This allows for a large redundancy in the electrical connection structure between the sampling section 31 and the battery cell monitoring unit 42, effectively reducing the risk of the circuit structure between the battery cell monitoring unit 42 and the battery cell 21 being broken due to the integrated component 40 being pulled out as a whole during maintenance. This improves the maintenance efficiency of the battery cell monitoring unit 42 and reduces the maintenance cost of the battery device 100.

[0161] According to some embodiments of this application, please refer to FIG13, a magnetic member 322 is provided on the folded portion 320, and the magnetic member 322 is used to bring the multiple folded portions 320 together.

[0162] The magnetic component 322 is a magnetic structural component. Two or more magnetic components 322 can attract each other and move closer together. For example, the magnetic component is a magnet.

[0163] Optionally, there are three folding parts 320, and each folding part 320 is provided with a magnetic member 322. That is, the connecting section 32 is provided with three magnetic members 322. The three magnetic members 322 can attract the three folding parts 320 so that the three folding parts 320 are close to each other.

[0164] Optionally, the number of magnetic 322 members may not correspond to the number of folded portions 320. For example, magnetic 322 members are provided on the folded portion 320 closest to the battery cell 21 and on the folded portion 320 closest to the battery cell monitoring unit 42. Under the action of the two magnetic 322 members, all folded portions 320 can be brought closer together.

[0165] In the above solution, by setting a magnetic suction element 322 on the folding part 320, the magnetic attraction force makes multiple folding parts 320 move closer to each other, reducing the waste of internal space of the battery device 100 caused by the redundant design of the connecting section 32, making the internal structure of the battery device 100 compact and the space utilization rate high.

[0166] According to some embodiments of this application, please refer to FIG8. The battery device 100 includes at least one battery cell assembly 20. The battery cell assembly 20 includes a plurality of battery cells 21 stacked along a first direction x. An integrated assembly 40 is located on one side of the battery cell assembly 20 along the first direction x.

[0167] The battery cell assembly 20 includes a plurality of battery cells 21, which are stacked along a first direction x. Optionally, in the battery cell assembly 20, the plurality of battery cells 21 are connected in series, in parallel, or in a mixed manner through a busbar component.

[0168] Optionally, the sampling element 30 can be a flexible circuit board. In the battery cell assembly 20, the flexible circuit board extends along the first direction x to cooperate with each battery cell 21, thereby collecting information from each battery cell 21.

[0169] The phrase "integrated component 40 is located on one side of battery cell assembly 20 along the first direction x" can be understood as meaning that integrated component 40 is located on one side of battery cell assembly 20 along the stacking direction of battery cell 21. For example, sampling element 30 is a flexible circuit board extending along the stacking direction of battery cell 21, with the end of the flexible circuit board continuing to extend along the stacking direction of battery cell 21 to connect with the battery cell monitoring unit 42 of integrated component 40.

[0170] In the above scheme, the integrated component 40 is set on one side of the stacking direction of the multiple battery cells 21 of the battery cell assembly 20, which facilitates the layout of the circuit structure between the sampling component 30 and the battery cell monitoring unit 42, making the internal space of the battery device 100 compact and effectively improving the volumetric energy density of the battery device 100.

[0171] According to some embodiments of this application, the battery device 100 includes at least two battery cell assemblies 20, which are arranged along a second direction y. The integrated assembly 40 includes at least two battery cell monitoring units 42, which are arranged in a one-to-one correspondence with the battery cell assemblies 20. The first direction x and the second direction y are perpendicular to each other.

[0172] Optionally, the battery device 100 includes at least two battery cell assemblies 20, such as two, three or more, which are arranged along the second direction y.

[0173] Optionally, the number of battery cell monitoring units 42 corresponds to the number of battery cell assemblies 20. For example, if there are two battery cell assemblies 20, there are two battery cell monitoring units 42. Each battery cell monitoring unit 42 is connected to the corresponding battery cell assembly 20 through a sampling element 30.

[0174] In the above scheme, the battery cells 21 in the battery cell assembly 20 are stacked along the first direction x, and the battery cell assembly 20 is arranged along the second direction y, which makes the spatial layout of the battery cells 21 in the battery device 100 compact, which is conducive to improving the volumetric energy density of the battery device 100. At the same time, by setting the battery cell monitoring unit 42 corresponding to the battery cell assembly 20, the voltage, temperature or other information of the battery cells 21 can be effectively monitored, which is conducive to the health management of the battery device 100 and the improvement of the reliability of the battery device 100.

[0175] According to some embodiments of this application, please refer to FIG4. The integrated component 40 further includes a low-voltage connector 44, which is disposed on the side of the substrate 41 away from the inside of the housing 10, and is electrically connected to the battery cell monitoring unit 42.

[0176] In some embodiments, a low-voltage connector 44 is also provided on the substrate 41. The connection relationship between the low-voltage connector 44 and the substrate 41 is diverse, including but not limited to riveting, welding, bonding, threaded connection or other connection methods.

[0177] Optionally, the low-voltage connector 44 can be used as a structural component for low-voltage circuit connection between the battery device 100 and the electrical device. For example, the low-voltage connector 44 is used to transmit information such as temperature and voltage within the battery device 100 to the electrical device, such as the vehicle 1000.

[0178] In some embodiments, the electrical device is a vehicle 1000, and the low-voltage connector 44 of the battery device 100 can be a low-voltage connector 44 at the battery end, which is used to match the low-voltage connector 44 at the vehicle end. The two can be connected to each other through plug and socket to realize the transmission of low-voltage signals in the battery device 100.

[0179] The phrase "the low-voltage connector 44 is disposed on the side of the substrate 41 opposite to the interior of the housing 10" can be understood as the connector structure of the battery device 100 for low-voltage signal transmission being disposed on the outside of the substrate 41 to facilitate the transmission of low-voltage signals with the power device. Exemplarily, the integrated component 40 includes a housing, and the low-voltage connector 44 includes a socket structure with the socket's insertion port exposed outside the housing to facilitate plug insertion of the power device's connector.

[0180] Optionally, the low-voltage connector 44 for electrical connection with the battery cell 21 may be located inside the substrate 41. For example, the low-voltage connector 44 for electrical connection with the battery cell monitoring unit 42 is located inside the substrate 41.

[0181] Optionally, the low-voltage connector 44 is electrically connected to the battery cell monitoring unit 42. The information of the battery cell 21 monitored by the battery cell monitoring unit 42 is transmitted to the power-consuming device through the low-voltage connector 44. The power-consuming device controls the state of the battery device 100 based on the information, such as cutting off the circuit of the battery device 100 or performing thermal management operations on the battery cell 21 of the battery device 100.

[0182] In the above scheme, the substrate 41 is also provided with a low-voltage connector 44. On the one hand, it can integrate the battery cell monitoring unit 42 and the low-voltage connector 44 into the same structure, which is beneficial to the wiring layout of the electrical connection structure between the battery cell monitoring unit 42 and the low-voltage connector 44, so as to save the material cost of the electrical connection structure between the two, thereby reducing the material cost of the battery device 100. On the other hand, since the substrate 41 can be disassembled from the outside of the housing 10, when maintaining the low-voltage connector 44 in the later stage, only the substrate 41 needs to be disassembled to maintain the battery cell monitoring unit 42 and the low-voltage connector 44. Therefore, the maintenance difficulty is low, the efficiency is high, and the maintenance cost is low.

[0183] According to some embodiments of this application, the integrated component 40 further includes a high-voltage connector 45, which is disposed on the side of the substrate 41 away from the interior of the housing 10, and is electrically connected to the battery cell 21 for the input and output of electrical energy.

[0184] Optionally, a high-voltage connector 45 is also provided on the substrate 41, that is, the high-voltage connector 45, the low-voltage connector 44, and the battery cell monitoring unit 42 are integrated into one unit. The connection relationship between the high-voltage connector 45 and the substrate 41 is diverse, including but not limited to riveting, welding, bonding, threaded connection, or other connection methods.

[0185] "The high-voltage connector 45 is located on the side of the substrate 41 away from the inside of the housing 10" can be understood as the connector structure of the battery device 100 for external output and input of electrical energy being located on the outside of the substrate 41.

[0186] Optionally, the high-voltage connector 45, which is a structural component for electrical connection with the battery cell 21, may be located inside the substrate 41.

[0187] The battery cells 21 in the battery device 100 input or output electrical energy through the high-voltage connector 45. For example, the high-voltage connector 45 is connected to the high-voltage connector 45 at the vehicle end, thereby enabling the battery device 100 to supply power to the vehicle end, and the external power source to charge the battery cells 21 of the battery device 100 through the vehicle end.

[0188] Please refer to Figure 4. The high-voltage connector 45 includes connection terminals with opposite polarities, one of which is positive and the other is negative. Both are connected to the busbar in the battery device 100.

[0189] In the above scheme, the substrate 41 is also provided with a high voltage connector 45, which integrates the high voltage connector 45, the low voltage connector 44 and the battery cell monitoring unit 42 into one unit. This can effectively reduce the assembly difficulty of the battery device 100 for external information output and power output and input structures, improve the manufacturing efficiency of the battery device 100, and since the integrated component 40 can be disassembled from the housing 10, the battery device 100 has low maintenance difficulty and low maintenance cost.

[0190] According to some embodiments of this application, please refer to Figures 14 and 15. Figure 14 is a schematic diagram of the battery cell 21, electrical connector 450 and integrated assembly 40 in some embodiments of this application, and Figure 15 is a schematic diagram of the electrical connector 450 in some embodiments of this application.

[0191] The battery device 100 also includes an electrical connector 450, through which the battery cell 21 is connected to the high-voltage connector 45, and at least a portion of the electrical connector 450 is made of a flexible material.

[0192] The electrical connector 450 is a structural component that connects the battery cell 21 and the high-voltage connector 45. Optionally, the battery cells 21 within the battery device 100 are connected in series, parallel, or mixed via a busbar component, which is connected to the high-voltage connector 45 through the electrical connector 450. Optionally, the electrical connector 450 is a busbar component, with one part connected to the battery cell 21 and the other part connected to the high-voltage connector 45. Optionally, the electrical connector 450 and the busbar component are separate structures, and they are connected to each other by welding, riveting, threaded connections, or other connection methods.

[0193] "At least a portion of the electrical connector 450 is made of a flexible material" can be understood as the electrical connector 450 being able to be stretched or folded to accommodate the integrated component 40 being pulled out and detached from the housing 10, and to accommodate the integrated component 40 being assembled into the housing 10.

[0194] For example, electrical connector 450 is a metal structure that is bent at least in one location; for instance, electrical connector 450 is a copper busbar with a bent structure. For example, electrical connector 450 is a bendable cable.

[0195] In some embodiments, the battery device 100 further includes an insulating member 50, as shown in FIG15. The insulating members 50 are arranged in pairs, and each pair of insulating members 50 includes two insulating members 50 arranged at a distance from each other. The number of electrical connectors 450 can be two, one of which corresponds to the positive terminal of the high-voltage connector 45, and the other corresponds to the negative terminal of the high-voltage connector 45. Each electrical connector 450 can be provided with a pair of insulating members 50, which are disposed at the bending portion of the electrical connector 450, that is, the bending portion of the electrical connector 450 is located between the two insulating members 50. The two insulating members 50 can play a supporting and guiding role.

[0196] In the above scheme, at least part of the electrical connector 450 is made of flexible material, so that there is a redundant design between the battery cell 21 and the high-voltage connector 45. This can effectively reduce the risk that the circuit structure between the high-voltage connector 45 and the battery cell 21 will be broken due to the integrated component 40 being pulled out as a whole during maintenance. This will help improve the maintenance efficiency of the battery cell monitoring unit 42 and reduce the maintenance cost of the battery device 100.

[0197] According to some embodiments of this application, as shown in Figures 14 and 15, at least a portion of the electrical connector 450 is a bent structure.

[0198] "At least a portion of the electrical connector 450 is a bent structure" can be understood as at least a portion of the electrical connector 450 having a bent portion, so that when not subjected to external force, the electrical connector 450 is stacked at the bent portion to have a shorter dimension, and that when the electrical connector 450 is subjected to external force (e.g., when the integrated component 40 is pulled out and detached from the housing 10), the bent portion of the electrical connector 450 is stretched, thereby having a longer dimension.

[0199] For example, the electrical connector 450 is a busbar, a portion of which is connected to the battery cell 21, for example, by soldering to the electrode output terminal (e.g., terminal post) of the battery cell 21. Another portion of the copper busbar extends toward the integrated assembly 40 and has a bent portion for connection with the high-voltage connector 45. The bent portion can be seen in Figures 14 and 15. The other portion of the copper busbar is bent at four locations, forming a first corner segment, a first straight segment, a second corner segment, a second straight segment, a third corner segment, a third straight segment, a fourth corner segment, and a fourth straight segment in sequence. The fourth straight segment is connected to the high-voltage connector 45.

[0200] In the above solution, by setting at least a portion of the electrical connector 450 as a bent structure, the redundancy of the electrical connector 450 can be made larger, which can effectively reduce the risk of the circuit structure between the high voltage connector 45 and the battery cell 21 being broken due to the integrated component 40 being pulled out as a whole during maintenance. This is conducive to improving the maintenance efficiency of the battery cell monitoring unit 42 and reducing the maintenance cost of the battery device 100.

[0201] According to some embodiments of this application, the integrated component 40 also includes a manual maintenance switch 46, which is disposed on the side of the substrate 41 away from the interior of the housing 10 and connected in series with the high-voltage connector 45.

[0202] The manual maintenance switch 46, also known as the MSD (Maintenance Switch Disconnector), is mainly used to manually disconnect high-voltage circuits, reduce operational risks, and protect the personal safety of maintenance personnel.

[0203] In some embodiments, a manual maintenance switch 46 is also provided on the substrate 41, so that the integrated panel integrates a high-voltage connector 45, a low-voltage connector 44, a battery cell monitoring unit 42 and a manual maintenance switch 46, making the integrated component 40 functionally diverse and effectively improving the space utilization of the battery device 100. At the same time, since the substrate 41 is detachably connected to the housing 10, it is convenient for maintenance.

[0204] The manual maintenance switch 46 is connected in series with the high-voltage connector 45. Optionally, the manual maintenance switch 46 is connected to the positive output terminal of the high-voltage connector 45.

[0205] In the above scheme, the substrate 41 is also provided with a manual maintenance switch 46. The manual maintenance switch 46, the high voltage connector 45, the low voltage connector 44 and the battery cell monitoring unit 42 are integrated into one unit, which can effectively reduce the assembly difficulty of the battery device 100 for external information output and power output and input structure, improve the manufacturing efficiency of the battery device 100, and since the integrated component 40 can be disassembled from the housing 10, the maintenance difficulty of the battery device 100 is low and the maintenance cost is low.

[0206] According to some embodiments of this application, referring to FIG7, two battery cell monitoring units 42 are provided on the substrate 41, the two battery cell monitoring units 42 are arranged at intervals, and the high voltage connector 45 and the low voltage connector 44 are located between the two battery cell monitoring units 42.

[0207] In some embodiments, the high-voltage connector 45 and the low-voltage connector 44 may be disposed in the middle of the substrate 41, and two battery cell monitoring units 42 are disposed on the substrate 41, with the two battery cell monitoring units 42 located on both sides of the high-voltage connector 45 and the low-voltage connector 44. For example, along the second direction y, the substrate 41 may be divided into three regions, with the high-voltage connector 45 and the low-voltage connector 44 disposed in the middle region, and the two battery cell monitoring units 42 respectively disposed in the two regions at the two ends.

[0208] In the above scheme, the two battery cell monitoring units 42 are set on both sides of the high voltage connector 45 and the low voltage connector 44, which facilitates the connection between the connectors at the battery end and the connectors of the power device, and reduces the assembly difficulty between the battery end and the power device.

[0209] Some embodiments of this application also provide an electrical device, including the battery device 100 described above.

[0210] Optionally, the electrical device can be a vehicle 1000, as shown in Figure 1. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. The type of vehicle 1000 can be a sedan, SUV, heavy truck, or bus, etc. A battery device 100 is installed inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000's electrical system, such as meeting the power requirements for starting, navigation, and operation of the vehicle 1000.

[0211] Optionally, the battery cell monitoring unit 42 of the battery device 100 can be electrically connected to the controller 200 of the vehicle 1000 to transmit the monitoring information of the battery cell 21 to the controller 200 of the vehicle 1000, and the controller 200 can manage the battery device 100 based on the information.

[0212] According to some embodiments of this application, an electrical device is provided, as shown in Figures 2-15.

[0213] The battery device 100 includes a battery cell 21, a housing 10, a sampling component 30, and an integrated assembly 40. The housing 10 includes a first housing body 11 and a second housing body 12, which are interconnected and together define a space for accommodating the battery cell 21. The first housing body 11 has a bottom wall 110 and front panels 111 disposed at both ends of the bottom wall 110, with the two front panels 111 positioned opposite each other along a first direction x. The second housing body 12 has a top wall 120 and side walls 121 disposed on both sides of the top wall 120, with the two side walls 121 positioned opposite each other along a second direction y. The bottom wall 110 and the top wall 120 are positioned opposite each other along a third direction z, with the first direction x, the second direction y, and the third direction z being perpendicular to each other. The ends of the two front panels 111 facing away from the bottom wall 110 are respectively connected to the top wall 120, and the ends of the two side walls 121 facing away from the top wall 120 are respectively connected to the bottom wall 110.

[0214] The housing 10 contains a plurality of battery cells 21. Exemplarily, the housing 10 contains two battery cell assemblies 20, which are arranged along a second direction y. Each battery cell assembly 20 includes a plurality of battery cells 21 stacked along a first direction x. An integrated assembly 40 is disposed on one side of the housing 10 along the first direction x.

[0215] Optionally, one of the front panels 111 of the first housing body 11 is provided with an opening 1110, and the integrated component 40 is detachably mounted on the one of the front panels 111 by fasteners 43 and closes the opening 1110.

[0216] The integrated component 40 includes a substrate 41 and a battery cell monitoring unit 42, a low-voltage connector 44, a high-voltage connector 45, and a manual maintenance switch 46 connected in series with the high-voltage connector 45, all disposed on the substrate 41. In some embodiments, there are two battery cell monitoring units 42, with the low-voltage connector 44, the high-voltage connector 45, and the manual maintenance switch 46 connected in series with the high-voltage connector 45 located in the middle of the substrate 41, and the two battery cell monitoring units 42 located on both sides of the substrate 41 to correspond to two battery cell assemblies 20.

[0217] The high-voltage connector 45 is connected to the battery cell 21 inside the housing 10 via an electrical connector 450. At least a portion of the electrical connector 450 is made of a flexible material, and at least a portion of the electrical connector has a bent structure. Exemplarily, the electrical connector 450 is a busbar, a portion of which is connected to the battery cell 21, for example, by soldering to the electrode output terminal (e.g., terminal post) of the battery cell 21. Another portion of the copper busbar extends toward the integrated assembly 40 and has a bent portion for connection with the high-voltage connector 45.

[0218] The battery cell monitoring unit 42 is electrically connected to the battery cell 21 via the sampling element 30 to monitor information such as the temperature and voltage of the battery cell 21. Optionally, the sampling element 30 includes a flexible circuit board, comprising a sampling section 31 and a connecting section 32. The sampling section 31 is the part of the flexible circuit board connected to the battery cell 21, and the connecting section 32 is the extension of the flexible circuit board outside the battery cell 21, which can be connected to the battery cell monitoring unit 42. In some embodiments, the connecting section 32 is bent at at least one location, such that when the connecting section 32 is not subjected to external force, the bent portion of the connecting section 32 is stacked to have a shorter dimension, and when the connecting section 32 is subjected to external force, the bent portion of the connecting section 32 is stretched to have a longer dimension. For example, referring to FIG13, the connecting segment 32 is bent at multiple positions in the first direction x to form multiple folded portions 320 stacked along the first direction x. The folded portions 320 are in the shape of straight segments, and two adjacent stacked portions are bent through the connecting portion 321, which is in the shape of an arc segment.

[0219] In some embodiments, each fold 320 is provided with a magnetic member 322, that is, the connecting section 32 is provided with three magnetic members 322, and the three magnetic members 322 can attract the three folds 320 so that the three folds 320 come close to each other.

[0220] In the above solution, by integrating the battery cell monitoring unit 42, low-voltage connector 44, high-voltage connector 45, and manual maintenance switch 46 onto the substrate 41, and with the substrate 41 detachably mounted on the wall of the housing 10 from the outside of the housing 10, the functional components of the battery device 100 that realize information monitoring, transmission, and input and output of electrical energy can be integrated into one unit, thereby improving the space utilization of the battery device 100 and reducing material costs. On the other hand, compared with the related technology solution where the battery cell monitoring unit 42 is located inside the housing 10, since the entire integrated component 40 can be disassembled from the outside of the housing 10, it is not necessary to disassemble the housing 10 to maintain or replace the battery cell monitoring unit 42, which can effectively improve maintenance efficiency and reduce maintenance costs.

[0221] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery device, wherein, include: The box body has an opening in its wall, which connects to the interior of the box body. The battery cell is disposed inside the housing; A sampling device, used to collect information from the individual battery cells; An integrated component includes a substrate and a battery cell monitoring unit. The substrate is located outside the housing and is detachably connected to the wall of the housing and closes the opening. The battery cell monitoring unit is disposed on the substrate, and the sampling element is electrically connected to the battery cell monitoring unit.

2. The battery device according to claim 1 or 2, wherein, The battery cell monitoring unit is located on the side of the substrate facing the interior of the housing.

3. The battery device according to any one of claims 1-3, wherein, The battery device also includes fasteners configured to detachably connect the substrate to the wall of the housing from the outside of the housing.

4. The battery device according to any one of claims 1-3, wherein, The substrate is an insulating board.

5. The battery device according to any one of claims 1-4, wherein, The sampling component is a flexible circuit board.

6. The battery device according to any one of claims 1-5, wherein, The sampling components include: A sampling segment, wherein the sampling segment is connected to the battery cell; A connecting segment, one end of which is connected to the sampling segment and the other end of which is connected to the battery cell monitoring unit, wherein the connecting segment has a bent structure.

7. The battery device according to claim 6, wherein, The connecting segment includes multiple folds and at least one connecting part, with the multiple folds stacked on top of each other and adjacent folds connected by one connecting part.

8. The battery device according to claim 7, wherein, The folded portion is provided with a magnetic attractor, which is used to bring the multiple folded portions together.

9. The battery device according to any one of claims 1-8, wherein, The battery device includes at least one battery cell assembly, the battery cell assembly including a plurality of battery cells stacked along a first direction, and the integrated assembly located on one side of the battery cell assembly along the first direction.

10. The battery device according to claim 9, wherein, The battery device includes at least two battery cell assemblies arranged along a second direction. The integrated assembly includes at least two battery cell monitoring units, which are configured in a one-to-one correspondence with the battery cell assemblies. The first direction and the second direction are perpendicular to each other.

11. The battery device according to any one of claims 1-10, wherein, The integrated component also includes a low-voltage connector disposed on the side of the substrate opposite to the interior of the housing, and the low-voltage connector is electrically connected to the battery cell monitoring unit.

12. The battery device according to claim 11, wherein, The integrated component also includes a high-voltage connector, which is disposed on the side of the substrate opposite to the interior of the housing, and is electrically connected to the battery cell for the input and output of electrical energy.

13. The battery device according to claim 12, wherein, The battery device further includes an electrical connector, through which the battery cell is connected to the high-voltage connector, and at least a portion of the electrical connector is made of a flexible material.

14. The battery device according to claim 13, wherein, At least a portion of the electrical connector is a bent structure.

15. The battery device according to any one of claims 12-14, wherein, The integrated component also includes a manual maintenance switch, which is located on the side of the substrate opposite to the interior of the housing and connected in series with the high-voltage connector.

16. The battery device according to any one of claims 12-15, wherein, Two battery cell monitoring units are disposed on the substrate, with the two battery cell monitoring units spaced apart, and the high-voltage connector and the low-voltage connector located between the two battery cell monitoring units.

17. An electrical appliance, wherein, Includes the battery device according to any one of claims 1-16.

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